Wire Marking Device for Laboratory Cassettes
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Solution Overview
Problem
Existing devices for marking laboratory sample cassettes often produce unclear markings and can damage foil tape due to dragging the stylus, which is not suitable for cassettes with varying physical properties.
Innovation Solution
A device using a group of parallel wires with heating and oscillating means to mark the cassette, where the wires oscillate at high frequency and translate transversely to impact the foil tape, minimizing damage and improving marking clarity, with a ceramic guide for efficient heat transfer and a control system for precise marking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stylus is dragged over foil tape to mark the cassette, then marking can be achieved, but the foil tape is damaged and markings are not sharp
Solution Approach 1:
The patent applies ultrasonic vibration to the stylus at high frequency (20,000-40,000 Hz) with small amplitude (0.25 mm). This vibration allows the stylus to impact the foil tape rather than drag across it, producing cleaner markings while minimizing damage to the tape. The vibrational energy enables precise material removal or deformation without the harmful lateral forces caused by dragging.
Solution Approach 2:
The patent replaces the conventional mechanical dragging motion with a combination of ultrasonic vibration and controlled impact. Instead of continuous contact and dragging, the vibrating stylus makes rapid intermittent contact with the foil tape, substituting the harmful mechanical dragging action with a controlled vibrational impact mechanism that achieves marking without excessive force.
2Manufacturing precision
If heating means is applied to the marking device, then marking quality improves, but heat transfer efficiency to the wire end is difficult due to small wire diameter
Solution Approach 1:
The patent introduces a ceramic guide as an intermediary component between the heating element and the wire end. The ceramic guide is positioned within 0.2 mm of the wire end to facilitate efficient thermal conduction. This intermediary structure solves the heat transfer problem by providing a dedicated thermal pathway that compensates for the small wire diameter, ensuring the wire end reaches the required temperature (160°C-210°C) for quality marking.
Solution Approach 2:
The patent applies heating locally and selectively to specific wires rather than heating the entire assembly. The heating means is positioned to target only the wire ends that require marking, with the ceramic guide concentrating thermal energy precisely where needed. This local quality approach improves heat transfer efficiency by avoiding unnecessary heating of non-marking areas while ensuring sufficient temperature at the marking interface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides cleaner and more precise markings on laboratory sample cassettes by using high-frequency oscillation and controlled heat, reducing foil tape damage and accommodating cassettes with different physical properties.
Implementation Method 1
heating means arranged to heat an end of said plurality of wires
Implementation Method 2
oscillating means arranged to oscillate selected wires in a first direction to and from a marking location; the oscillating means may be arranged to oscillate the selected wires at a frequency between 20,000 and 40,000 Hz
Data Source
AI summary
A device (1) suitable for marking a laboratory sample cassette (2) has a platen (6) with an aperture (7) and a cassette (2) is positioned so that a marking surface (3) of the cassette is aligned with the aperture (7). The device (1) also has a plurality of wires (9) with each wire (9) connected to a solenoid (11). An end (10) of each of the wires (9) is heated by a ceramic guide (12a) and selected ones of the heated wires (9) are oscillated once in a first direction (25) by their respective solenoids (11) to and from the aperture (7) to mark the marking surface (3). All the wires are then moved in a second direction transversely relative to the first direction (25) and selected wires are then oscillated once to mark the marking surface (3). This process is repeated until the required marking of the cassette marking surface (3) is completed.